Is This Correct Venting? I Live in St.Louis County Missouri

[NeedHelpAlways]

So I received a plumbing violation when I was trying to get an occupancy permit. I contracted a plumber to update the plumbing and he removed my cast iron stack and the abs glued to pvc and this is the final project for $2800 but is this correct? My concern is I smell sewer after I flush the toilet. I have a ranch home and 2 toilets are back to back, in one of the bathrooms there's a tub/shower and the other is just a shower. Then in the basement I have a bathroom with a toilet and shower. And he increase the kitchen plumbing to 2''. All the drains were 1 1/2''. Please advise. Thank you

 

[Terry]

Which pictures are of the toilets?

 

[Sponsor]

 

[NeedHelpAlways]

Which pictures are of the toilets?

013512 and 013455 the 2nd row

 

[NeedHelpAlways]

013512 and 013455 the 2nd row

the 2 toilets are sitting directly behind the stack so you can see them looking head on

 

[NeedHelpAlways]

So I think this is a better picture. The 2 toilets are sitting behind the stack in a horizontal manner.